I don't believe it is as simple as you think. It is not just text. For Excel, you need it to be able to recognise columns and rows, the format of the text, the alignment, and so on. Then it need to be able to make all of that from scratch. To make proper rows, colums, the size of them, the format the alignment of the text. It wuld need to be some advanced AI software. Then there are formulas and macroes, it can't do that, because they is not visible. And there are multiple pages, that need to be scrolled. With Excel, it needs to be scrolled horizontally too. And that is just for Excel, for other software - Word, Access, and so on, it needs a separete dedicated AI software.